Tire-grip.



R. A. BREUL.

TIRE GRIP. APPLIUATION FILED JUNE 20, 1912.

1,043,062. I V Patented N0v.5,19 12.

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onrrnn sTAtrns PATE orrron.

' RICHARD A. Bnnunprjnnmsflonr, conuno'rxour;

TIRE-GRIP.

: Specificationof Letters Pgtent.

. PatentedNov.j5,1912.

hpplication'filed June 20,1912, ,Serial n. 704,725;

To all whom it may concqr'rn 'Be it known that I, RICHARD A. Bnnun, acltizen of the United States, residing at Bridgeport, in the pountyofFairfield and State of Connecticut,haveinyented a new and usefulTire-Grip for Use on Pneumatic Tires for the Purpose of Preventing theSidewise Skidding of; Such Vehicle-Tires. The following is aspecification thereof.

There are now in use and patented two distinctive classes of such tiregrips, one kind being securely fastened to the rim or spokes of thewheel, the other one being applied to the tire in'such 'a manner as tobe allowed to slip along and around the tire.

My present invention is of this latter kind, and its object is tosecurecertain steps of positive and reliable advancement of the grip aroundthe tire as against casualor voluntary and not dependable movements ofso called creeping tire grips at present in use. p p

A further object of this invention; is contained in the provision of aseparate tightening device, after the griphas been secured to the tire,and furthermore the tread por- .tion of vmy grip has been arranged 1n amanner to secure a, large amount of gripping resistance in case of sideskidding by the introductionof longitudinal or peripheral tread chains.

My invention consists in thenovel construction and combination of partsas hereinafter described and explained, and 'defined in the appendedclaims.

Referring to the accompanying drawings as part of such description andspecification,

Figure 1 is an end elevation and Fig; 2 a

side elevation of a wheel and tire, both' figures showing the mainconstruction of myinvention, but only a number of auxiliary tread chainsare'in place, the rest being I omitted. 'Fig. 3 shows a special mannerof connecting the main divisions or loops of my grip. Figs. 4:, 5 and 6are side, top and end views respectively ofa special spring hook engagedby a take-up and adjusting member illustrated in Figs. 7 and 8, the

' first being a plan view and the latter an end view thereof. 3 f

A tire A is secured to rim of wheel W, as shown in Fig. 2. To the A aresecured four endless chain loops B, B "B" and B".which*surround undertension corresponding jq'uarter sections of the tire, such l holds themtogether therea tension' being maintained by the connection oftheseloops with each other at their nearest point of approach, which is onthe outside. or greatest periphery of the tire.

connect-ionof the loops is preferably '60 'efiectediby llIlkS (3, y andga ing the nearest. approaching chain lin s of adjoining loops. .Oneloop only, see B, Fig. 2, is separable and supplied on both sides of thetire with v snap hooks F, of any. suitable construction, for the purposeof attaching and of detaching the device from the tire.- The grip isnowsecured to; the tire and cannot comeoff while in use, but as creepingtire grips should preferably hug the tire tightly, and

all slack thereof should be taken up, I have I provided the additionaladjusting device shown in Fig. 2, consisting of the parts G and H, showndisconnected .in such drawing, and attached "to certain side links ofloops B and B bythe links I and I As will be seen, such device consistsof the channel plate H and snap hook G, this I latter one being furtherillustrated on anl enlarged scale inFigs. .4, 5, and 6.- It consists ofbase N, carrying hook part M. The flat spring S is secured toN by tworivets, P and P, and bears well, against hook nose 0. The yoke T isriveted to spring 8 allow- 55 7 ing only suflicient movement thereof forthe introduction of the channel shaped adjusting member H shown enlargedinFigs. 7 and 8. This part is bentfrom a plate to form base V andparallel sid'es X andX. v 1: I

Hole Z is for therecept-ionof a connecting,

-link, and a numberof apertures Y, Y, Y"

and .Y are for the introduction of nose" O ofihook member G.

It will be seen, that the spring s, Fig. 4,

will yield sufliciently to allow the channeled member to pass under andslide along nose ()andinto space U, Fig. 6, until suificient thereby;

n ,will be zobserved that the channel shape of member H. serves. the.double purpose of 'securely and readily guiding the two memberswhilebeing adgtusted, and also er, so that no strain or accident maydislocate them or shift'their proper relative position toward eachother.

The description ofthe main structure and mode of application of'myinvention being I1OW completedl have yet to allude to the tread Ollfllllportion of my device.

I The endless chain loops'B, B, B and "B have parallel sides connectedby and 10,

continuingin oval shaped end connections passing] diagonally along andacross the outer periphery of the; tire These loop end ovals, togetherwiththeir connecting-links G, C",-,G" and C, while'being componentportions of the main structure, also serve in the capacity of treadchains, very effectively covering, by'reason of their diag .onaldisposition, four good portions of the tire. Being partly for such use,these oval .loop portions are preferably constructed of short chainlinks, While the links of the straight side portion of these chain loopsmay be composed of much longer links. To

, further increase the serviceability .of these side of the wheel.

tread chains just described, the loosely hang: ing chains E and E areapplied between all the loops as indicated in Fig. 2. These chains E, E,etc. 1 are located outside the meandi'ameter. and along the outerportion of the tire and come into contact with the pavement and actiononly when the vehicle .commences to skid and when the contact portion ofthe tire is thereby thrown'to one Thus, when most needed, and at everyquarter revolution of the Wheel,

these looping peripheral tread chains drag on and grip to the pavementand effectively prevent further skidding, It is important that theseperipherally located treadchains should-be so long as to hang loosely inplace,

i so that they'may not interfere with the Ccp ies of fliis patent maylie-obtained for justing..-device having been described,l will 'nowexplain the positive periodical shifting action offrnyjg ip along theperipheryof 'As thec'nnected loop ends strike and passthe pavemenn'theportions of the pneumatic tire-covered by them becomefiattened, whilesustaining the weightof the vehicle, and"- thereby the chains in'theseconnections become somewhat slackened. There being continuous fstrain onthe tire grip'reverse to'the direction of the turning wheel, by.. reasonof vits-qinertia, and. as .the..greater amount of"slackc haini is thrownforward,

7 wheel.

detachable hooks bein a slight backward movement of the entire gripoccurs at every g uarter turn of the It must be observed that thetensional strain of the grip, acting on the tread chains composed of theloop ends, is the main factor in effecting this steplike advancement ofmy improved device.

Fig. 3- illustrates a top view of the connected end bows of two loops,another form of end connection being emploved therein however, as threeconnecting links, L, L and L", are used in place of one only, and thecentrally located links K and K of the bows of loops B and B are ofnecessity somewhat longer than the other links of these end ovals. I I

While the employment of four loops for the construction of my deviceappears to be preferable, three or five or more such loops may form thecomponent parts of my pres- ,ent grip Without departing from-the spiritof my invention.

Having thus described my improvement,

I claim 1. A tire grip formed of endwise connected, elliptical chainloops, each one inclosing a segmental portion of the tire and forming acomplete chord line of such segment along both tire sides and across theperiphery thereof, one such loop containing a separating attachment oneach tire side, and means attached to the side portions of two adjoiningloops for obtaining, and to adjust,

tension to such tire grip.

2. A tire grip consisting of a seguence of endless chains formed intoelliptical loo s, adjoining onesbeing connected together by centrallylocated attaching links engaging the links situated in the apiccs ofsuch loops, contained in the sides of one loop, an peripherallysituated, slack tread chains being attached to he end ovals of adjoiningloops.

3. A tiregriptread chain arrangement,

consisting of a cross formation having a central i connection, incombination with slack hanging, longitudinally disposed tread chains,held by and suspended between such cross forming chains and situatedalong the outer surface of both tire sides. I

4. A'tire grip composed of four chain loops inclosing four quartersegments of a tire, such loops being connected by links resting on theouter periphery'of the tire, attachments on one loop for the disconnection of the. device, and transverse tread chains attached to theparallel portions of the loop sides.

, RICHARD A. BREUL.

,V ll nesses: =EnwAnn FJMARVIN, B. F. PIKE.

five cents each, by addressing the Commissioner of Patents, Washington,10/0.

